Cutting tool



F. E. BERRY CUTTING TOOL Oct. 10, 1933.

Filed March 6, 1951 ENT Frank 5'. Barr Figure" l is anendyiew.Oftheitool assembled in any suitable manner aswell known in the"Patented Oct. 0, 1933 The present invention] pertains to .a novelcutting tool suchjas a vreamer'having removable .The principal objectofthe'inventionfis toproj vide a device of this; character wherein the'detachablejjor separate bladesfr'nay readily be 111- receives a wedgewhich has a cjo'mpound'action' in looking or",bindinj the bladetransversely in drawing itinwardly against the bottom of the slot. These'functionafollow respectively from a on n a a li me a fh wedge. I o g .11 ,The inventionjis fully; disclosedfbywayof ex ample in'l the followingdescriptionfand' in the accompanying drawingfimwhich according totheiiive'ntion? "1 Fig.2. is a longitudinal section of 'the"body',showing 'o'ne'of 'the'blades in position;

Fig. 3 is a fragmentary'plan view of the body;

. This means-enables adjustment of the diameter of the tool within arangeof about three-eighths -of an inch. The rear end of the blade isre-- Fig. 4 is a top plan viewoof the wedge; and Fig. 5 is a fragmentarycross section of the assembled tool, showing the relation of the wedgeand blade.

Reference to these views will now be made by use of like characterswhich are employed to designate corresponding parts. throughout.

In Figures 1 and 2, the body is shown as consisting of a substantiallycylindrical member 1 into which blades may be inserted for use as areameras will presently appear. The body has an axial bore 2 forreceiving a driving spindle art.

In order to receive the cutting'blades, the body is formed on its outersurface with a series of longitudinal slots 3 which however are inclinedto the axis of the body'as shown more clearly in Figure 3. Inasmuch asthese slots are alike, a detailed description of only one of themisnecessary.

The lateral walls land 5 of the slot converge outwardly of the'body asmay be clearly seen in Figures 1 and 3. Inasmuch as each 'wall is formedby a tool having perpendicular cutting sides, one sidedefining a walland the other side defining a portion of the bottom, the bottom of theslot consists of two surfaces at an. angle to' each other and forming avertex 6. Although there is no limitation tothe angular position of V #39 801 I H G Q 4I ,m 'kn. "Berr Detroit, ;"Mi1i., ass ignor toBrown-McLaren Manufacturing, Company, De-. ireiil a @rm t fie e g--Application' March 6, 1 931. Serial No 520,596 a.

is not obstructed by contact'of' the wedge with of i3 ,jtO a lineparallelto a radius through the point 6., 'Theiwali 5may form an angleof15 12"to a line parallel to a radius through' the the walls 4 and 5 ;thewallfl may'form-anangle point 6'. ;Mo reover, thejwalls 4 and-'5 alsocon-r verge lengthwise'of the body toward the rear end thereof, and ithe'botto'm of the slot has'a.

slope inwardly of theb'odyg" toward the rear end as clearly shownfinFigure 2,. Forexamplegthe Win14 may lief'at an angle of'ii'l"and'thewall body, and the slope at t e. bottom of the slot may new.

't'dthe azi'is'of the body. 'Moreover,"due 't'othe slope in the bottomof the, slot, ,the eifectivefor cutting radius of the blades is' reducedas they are moved towards the rear end of the body.

lieved at 10 in order not to interfere with the curved run-out 11- atthe rear end of the slot.

In order to secure the blade in its slot, there is provided a wedge 12adapted to engage the Wall .4. This wedge tapers transversely and alsolengthwise asclearly' shown in Figures 4 and 5, and whe'n'properlyinserted in the slot, the transverse. taper is outward of the body andthe lengthwise taper is rearward.- The inner face 13 of the wedge isshaped to make surface contact with the inner face 14 of the blade. Theface'13 isformed with a longitudinal key 15 receivable in a longitudinalslot 16 in the face 14. The slot 16 .is' parallelto the inner edge ofthe blade, but the key 15 is not parallel to the. lower edge of thewedge, orat least the wedge does not extend to thebottom of the slotwhen the blade and wedge are assembled in the slot, so that the inwardpull of the blade asthe wedge is forced rearwardly into the slot,

the bottom of the slot. the key, or the edge nearer the center of thebody, has an outward slope, and the corresponding wall 18 of the slot 16is similarly sloped, so that an inward movement of the wedge towards inresponse to the transverse taper of the wedge,

.105 The inner edge 17 of the bottom of the main slot results in awedging action on the blade towards the wall 5 at the surfaces 17 and18.

In assembling the device, one blade at a time is laidin the slots,against the wall 5 and resting onthe bottom. The width of the lower edgeof the blade is'such as to cover one of the angularly related surfacesconstituting the bottom. The blade is pushed lengthwiseinto-the slotuntil the cutting edge thereof is slightly more than the requireddistance from the cen-' ter of the body. A thrust collar 19 may now 7 bescrewed down on the threads 20 of the body until abutting the rear endof the blade; In

this position the collar constitutes a stop 'for 10 cating the otherblades as they are inserted. The smaller end of the wedge 12 is nowinserted into the forward or larger end of the slot, the key 15 thereofentering the slot 1'6-'as already described. .The wedge in this positionis driven as far as possiblev into the slot. In the final positionof thewedgefthe fiat sidethereof engages the 'wa1lf4' of the slot, While thejlength' wise taper of the wedge causes the blade to be jambed againstthe wall 5. The transverse taper of the wedge draws the bladefirmlyagainst the 5015mm 6 of the slot,fespeci'ally because of thesliding keyfconnection which causes the blade to' fo1low the inwardradial movement of the wedgefwIflthe'wedge should continue to moveradially inward after the blade has come into firm engagement with thebottom of the slot,

tion has been illustrated and described, it will be understood thatvarious alterations in the details of construction may be made withoutdeparting from the scope of the invention, indicated by the appendedclaims. 7

I What I claim is 1. A tool comprising a body havinga blade slot, ablade receivable therein and adapted to engage one of the lateral wallsof said slot, a

wedge receivable 'endwise in said slot in a direction axial of saidbody. and adapted to engage said blade and the other lateral wall of ofsaid body and cowards its entering end and tapered again radiallyoutward of said slot, whereby to draw said blade towards the base ofsaid slot and bindit against the first named lateral wall, a key formedlongitudinally on the side of said wedge contacting withsaid blade, thecontacting side of the blade having a slot for receiving said key, the'inner longitudinal edge or said key being sloped outwardly andtransversely of said head. I V g 2."A tool comprising'abody' havingfablade slot, a blade receivable therein and adapted to engage one of thelateral walls of said slot, a wedge receivable .endwise in. said slotin, a direction axial of said-body and adapted to engage said blade andtheother lateral wall of said v slot, said wedge being taperedlengthwise of said body and towards its 'enteringendand tapered againradially outward'of saidslot,whereby to draw said blade towards the baseof said slot and bind it against the first named lateral wall, a keyformed longitudin'ally'on the side of said wedge contacting with saidblade, the contacting side of the blade having aslot for receivin'g'saidkey, the inner longitudinal edge ofisaid key being sloped outwardly andtransversely of said head, the inner longitudinal wall of the slot inthe blade being shaped for surface contact with said inner edge of saidkey. a BERRY.

